Toward a compact fiber comb with 1.66 × 10−12 instability based on acetylene-filled photonic microcells

We demonstrated an optical fiber frequency comb stabilized to an acetylene-filled photonic microcell.The short-term instability of the comb at 1 s gate time was 1.66 10 -12 for a 4.2-h measurement in a laboratory environment with air conditioning.This is the best short-term stability reported for a compact fiber comb stabilized to an acetylene-filled photonic microcell at telecom wavelengths.It is particularly significant in the development of compact fiber combs with target instability of 10 -13 .Such a device has the potential to serve as an alternative to GPS in areas lacking signal coverage, including remote locations, regions with adverse weather conditions, and military intelligence areas.